How the Squid Lost Its Shell

  • Publicado el 17 abr 2018
  • The ancestors of modern, squishy cephalopods like the octopus and the squid all had shells. In ancient times, their shell was their greatest asset but it eventually proved to be their biggest weakness.
    Special thanks to Franz Anthony for the beautiful cephalopod reconstructions. You can see more of Franz's tremendous work at
    And thanks as always to Nobumichi Tamura for allowing us to use his wonderful paleoart:
    Produced in collaboration with PBS Digital Studios:
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    Squid Empire by Danna Staaf:
  • Ciencia y tecnologíaCiencia y tecnología

Comentarios • 1 969

  • Sean-Michael Strachan
    Sean-Michael Strachan Hace 8 horas

    The Awesomer brought me here. Did not disappoint. SUBSCRIBED

  • Disco plays
    Disco plays Hace 2 días +1

    how squid ward lost his hair

  • Emmanuel A.
    Emmanuel A. Hace 2 días

    Did I hear Omonyte!? Helix fossil!!!

  • John NoNameGibbon
    John NoNameGibbon Hace 4 días

    Jim Norton is a mollusk.

  • Arashi Mokuzai
    Arashi Mokuzai Hace 4 días

    CONGRATS ON THE PROMOTION!!! working for PBS now!!! I am stokked to see Sci show's host on PBS!

  • Raymond Wilson
    Raymond Wilson Hace 4 días

    Love this guy keep being awesome also love crash course (cc) helped me in college


    Wait..squids have 8 legs 😱😱😱

  • Toughen Up, Fluffy
    Toughen Up, Fluffy Hace 5 días

    What if centaurs could talk?

  • Octo Chan
    Octo Chan Hace 6 días

    It became a kid, then a squid, then a kid, and then more.

  • Lit_Coal
    Lit_Coal Hace 6 días

    "We're here for a good time not a long time boys!"- Ammonites

  • Ajitesh Chandra
    Ajitesh Chandra Hace 6 días

    the ancestors of lord helix.

  • Semirotta
    Semirotta Hace 6 días

    *I don't know why I always laugh out loud when I see the "feet" as measure of lenght next to meter system. It's just so damn stupid :D... "feet"...*

  • Paul B
    Paul B Hace 7 días

    Where did that first gas come from?

  • Johnathon Bozeman
    Johnathon Bozeman Hace 7 días

    I feel like im learning the history of pokemon....

  • George Bono
    George Bono Hace 7 días

    My favorite historical animal is the "Ammonite"

  • George Bono
    George Bono Hace 7 días +1

    It is a biggest mistake of a Cephalopods , if the Cephalopods still have it the whales will choke on e'm, I wish the giant squid
    have one so the sperm whale cant eat it :D

  • Toozday's Child
    Toozday's Child Hace 8 días

    "While Octopuses"
    um excuse me sir

  • Anthony Martinez
    Anthony Martinez Hace 9 días +1

    This channel rules!

  • Morgan Pastorchik
    Morgan Pastorchik Hace 9 días

    Did you steal this video from scishow are was it make here first?

  • Data
    Data Hace 11 días

    *Gasp*, Hank’s cheating on SciShow?!

  • Shawnne I Quick
    Shawnne I Quick Hace 11 días

    YAY! It's Hank!!! :)

  • Charles Randolph
    Charles Randolph Hace 11 días


  • Rene Garcia
    Rene Garcia Hace 13 días

    Reading Squid Empire and this video, along with Soul if an Octopus help develop a better understanding and appreciation for cehpolapod evolution. Great video!

  • P00NM45T3RFL3XXX
    P00NM45T3RFL3XXX Hace 14 días

    Hank Green definitely should be the next person to win a science communicator award. He is on par with Bill Nye, and Neil Degrass tyson in my opinion.

  • Stan Zlatanov
    Stan Zlatanov Hace 14 días

    there are 9 recorded mass extinctions on earth so far

  • Matthew Rhodes
    Matthew Rhodes Hace 15 días

    So one floating mollusk started banging non-floating mollusks and make Nautilus?

  • Pixel Pasta
    Pixel Pasta Hace 16 días

    7:25 First footage squid turf war (2018 colorized)

  • just a nigga with a rocket launcher

    Pretty sure I heard octopus Came From Outer Space?

  • Lisa Godin
    Lisa Godin Hace 17 días

    Swimming backwards is stupid.

  • Skip Bellon
    Skip Bellon Hace 17 días

    What was the creature that spawned bears and dogs? How long ago?

  • Henry Hoffman
    Henry Hoffman Hace 18 días

    can you make more videos about ancient cephlopopds?

  • Don K
    Don K Hace 19 días +1

    Truly fantasmic

  • Moogle
    Moogle Hace 21 un día


  • Flyinnoobz
    Flyinnoobz Hace 21 un día

    I hate those plastic things in the squid when eating them

  • Fieq
    Fieq Hace 21 un día

    reminds me of something when I was around 7-8yrs old,there's some sort of pond, well, it's more like mini swamp at the back of my school, and usually when I look at the waters, there's small ammonite-like creature, so small, at around the size of the eye's of dragonfly, as far as I can remember it moves just like ammonite explained on this video, and now it got me thinking, what actually are those things? cause my friend say it was "ammonite" back then and i was still young so I belive in it.
    anyone here got any clue?..

  • stable stool
    stable stool Hace 22 días

    ...and then the humans came

  • joshhaugh1
    joshhaugh1 Hace 22 días

    That's not an upside-down ice-cream cone, it's a squid wizard

  • Vassilinia
    Vassilinia Hace 22 días

    Ammonite... Omanyte...
    Jokes aside this was beautiful, if I were young again I might have gotten into paleontology thanks to this video. 😍

  • Happy Melon
    Happy Melon Hace 22 días

    So happy you said niche correctly.

  • Judson Joist
    Judson Joist Hace 22 días

    All of our technology mimics nature in some capacity. In this case, submarines. A nautilus basically has ballast tanks built into its shell.

  • Logitik
    Logitik Hace 23 días

    Squidward grandfathers

    MIKE UCCELLO Hace 24 días


  • Gordon Ramsay
    Gordon Ramsay Hace 24 días

    How do they know squids had shells in the first place?

    • Smile doge
      Smile doge Hace 5 días

      Fossils and carbon dating.

  • Harsh Jadav
    Harsh Jadav Hace 24 días

    I thank you sir for making this video I like to join you or any scientist. Can you please tell me how can I contact, ask or at least notify you about my curiosities?

  • Redshero
    Redshero Hace 27 días

    "Its the Cambrian explosion!"

  • Some Random Science Guy
    Some Random Science Guy Hace 27 días

    wait, so octopuses are just really smart, floating sea snails that don't have shells?

  • oof
    oof Hace 28 días


  • Derek Currie
    Derek Currie Hace 28 días

    Some of my favorite critters. Thank you! But I will point out that some of the live action 'squid' shots are actually of cuttlefish, their chubbier cousins:

  • flowerbiscuits
    flowerbiscuits Hace un mes

    poor boy!! lost he hat!!!

  • Darwin Gu
    Darwin Gu Hace un mes

    once i broke a rock and there was a shell fossil inside but then my friend made me drop it and i got mad lol. how rare would it be to find a shell inside a rock u found at school?

  • Madz The 3rd
    Madz The 3rd Hace un mes

    Fish with jaws
    Fish with jaws
    Taking over
    It wont be long

  • Ezinma88
    Ezinma88 Hace un mes +1


  • Chameleon
    Chameleon Hace un mes

    All hail the helix fossil

  • Lxx Uxn
    Lxx Uxn Hace un mes

    Plectronoceras is a strapping young man. Nice job lad

  • TyrStark
    TyrStark Hace un mes

    Nature is definitely my favourite R+D designer.

  • Lightup Darkness
    Lightup Darkness Hace un mes

    I ate them :(

  • rabbit buster
    rabbit buster Hace un mes +1

    you forgot the awesome tusoteuthis of the Cretaceous period

  • Mohammad Qunbos
    Mohammad Qunbos Hace un mes

    They developed a new way to float,ok why and how?
    Answer, we don't know yet.

    • Mohammad Qunbos
      Mohammad Qunbos Hace 8 días

      +Ben what about natural selection for the why, and mutation for the how,
      And your hair color is a part of your design, which is clearly not a random process for no particular reason.

    • Ben
      Ben Hace 9 días

      Theres no "why" it developed. It just happens. Why did my hair change from blonde in childhood to brown in adulthood? You are looking for intent that doesn't exist. Life is not a thing. It is something that things DO.

  • Katherine Terria
    Katherine Terria Hace un mes +1

    Was anyone else hyped up and thinking yeah you go little guy when they gained the ability to float?

  • Robo Doggo
    Robo Doggo Hace un mes

    Just saying the plural of octopus is octopites for your next video about cephelapods!

  • Mr. N
    Mr. N Hace un mes

    I want to learn why Bull Frogs are such voracious eaters. I mean they could eat a huge meal in minute and a few seconds later they start eating again. It drives me nuts; and also why do moths fly around so frantically and like to flutter near our legs and clothes?

  • wishbit
    wishbit Hace un mes

    I want to learn about the fossil record, what is it and how is it compiled? Why do people say "modern animals" I've only been able to get cursory knowledge about the fossil record can you go in depth?

  • SirXavior
    SirXavior Hace un mes +1

    Awesome video. I wish you were the one that taught me Paleoecology.

  • 2Siders Gaming
    2Siders Gaming Hace un mes

    They might have evolved into a colour changing super-predator, but but can they do it on a cold rainy night in Stoke?

  • Watches Sneakers
    Watches Sneakers Hace un mes

    I’m no stranger to Latin, but this guy makes it sound simple😅

  • Adnan Khan
    Adnan Khan Hace un mes

    I thought nautilus were extinct tf??😱😭😭😭

  • Adnan Khan
    Adnan Khan Hace un mes

    How does the evolution work? Like that pointy Cephalopod that was 20ft, when it blunted it’s shell, how did that carry on to its offspring?? And how long did it take?

    • Smile doge
      Smile doge Hace 5 días

      Don't they teach you this stuff in school, wtf? This is basic knowledge that every high schooler knows, at least here.

  • Max Cornhole
    Max Cornhole Hace un mes

    He said octopuses

  • itsukarine
    itsukarine Hace un mes

    squids are dex build

  • Bailey
    Bailey Hace un mes

    Shelled cephalopods look like they are wearing stylish hats.

  • No Pushbutton
    No Pushbutton Hace un mes

    Cthulhu with a birthday hat.

  • Muhd Shamsudin
    Muhd Shamsudin Hace un mes

    So they can change their own body form?

  • Som Eguy
    Som Eguy Hace un mes +2

    PBS Eons
    Hank Green, DUDE!, from a technical viewpont, you are right more often than that okay to be smart guy (mr. johansson). you is true irl biologist (doing my studies in bio. myself atm), even without degree.
    because asking the right/more interesting/valuable qu.s more relevant, and because of better formulated sentences (e.g. Scishow stuff, which i know the best because earliest).
    anyone, correct me if i'm wrong.

  • Nathan Tritchka
    Nathan Tritchka Hace un mes +1

    @PBS Eons,
    Would you please do a piece on the evolution of spiders.
    That would be awesome.

    CODPOV Hace un mes

    what happened to Schshow?

  • Justin Connors
    Justin Connors Hace un mes

    Did you do bats yet?

  • YM 9001
    YM 9001 Hace un mes

    Actually the only reason us Squids lost our shell is because we use Ink tanks now. Shells held our ink during some wars but with the Invention of new technology we now can use Ink tanks.

  • richard rivera
    richard rivera Hace un mes

    How did squid, and octopus get so big?

  • C-Rex
    C-Rex Hace un mes

    The squid at 1:41 looks like it's wearing a party hat.

  • George Fears Jr
    George Fears Jr Hace un mes

    What are non alien dinosaurs? 6:43

  • Kevin Arreazola
    Kevin Arreazola Hace un mes

    I'm just going to assume these evolutionary trends happened with Pokémon as well on my journey to become Pokémon master

  • plainlogic
    plainlogic Hace un mes

    Don't look at my gladius!

  • dnd 93
    dnd 93 Hace un mes

    That cuttlefish reminds me of that cuttlefish I caught a few days ago in Greece. It took me an hour since I could only use my hands. I released it of course but that was after I was done looking at how it breathes and swims

  • Irvin Angon
    Irvin Angon Hace un mes

    Is this the guy from APUSH crash course

  • Mee Mee
    Mee Mee Hace un mes

    Hank, what happened to your arms and legs?!

  • piraat6666
    piraat6666 Hace un mes

    Gnomes with tentacles

  • MrsMoon Jelly
    MrsMoon Jelly Hace un mes

    Getting icecream cone in the Cambrian explosion
    Me: 1 vanilla icecream cone
    Icecream man: sorry, we only have squid flavour with tentacles
    Me:I'll pass

  • apple sauce
    apple sauce Hace un mes

    Hi, I'm just an index fossil, look at me instagram

  • jake naylor
    jake naylor Hace un mes

    Would appreciate one about raven intelligence, esp how it evolved.Please.

  • Alex Foster
    Alex Foster Hace un mes

    to think our beloved squid ward could have looked so different.

  • Floppy Trombone
    Floppy Trombone Hace un mes

    This is the best counter argument to the conspiracy theory about octopus being from another planet.

  • slang Nbang
    slang Nbang Hace un mes

    Did pokemon copy animals or did animals copy pokemon 😒

  • Archon of Dread
    Archon of Dread Hace un mes


  • 80 Slim Shady's
    80 Slim Shady's Hace un mes

    So they used to be Omastars, so ancient pokemon were real!!!

  • Dima Andro
    Dima Andro Hace un mes

    He is so Hot wow

  • Sharmishtha Basu
    Sharmishtha Basu Hace un mes +1

    Awesome. Fascinating.

  • Leonidas Diamandopoulos

    What was the name of this dudes show? I remember him. It was huge.

  • Epic Terry
    Epic Terry Hace un mes

    *U N L E A S H E D*

  • Ze
    Ze Hace un mes

    best anime ever

  • Matt Ojeda
    Matt Ojeda Hace un mes +1

    I'm so sick of hearing the phrase, "non avian dinosaurs". Birds aren't dinosaurs. Dinosaurs may have evolved into them but they aren't dinosaurs. I hope this fad dies out.

    • grundiosa
      grundiosa Hace 29 días

      because "dinosaur" is a biological term based on how related organisms are, while the purpose of saying "non-avian dinosaurs" is to point out physical differences or talk specifically about the dinosaurs that died 66 million years ago.

    • Matt Ojeda
      Matt Ojeda Hace 29 días

      Then just call them dinosaurs. By your definition they're all the same, so why the specific destinction? When somebody refers to an ostrich they don't call it a non-avian dinosaur, it's referred to as a bird. Although I have heard the phrase "flightless bird", to me it's a bird. Chickens kinda fly, more like fluttering, I've never heard them referred to as "flightless birds" or "non-avian dinosaurs". I'm not saying you're wrong, I just don't like the phrase "non-avian dinosaur".

    • grundiosa
      grundiosa Hace un mes

      it's not a fad, it's biological fact. that's how science works: you make a definition, and can't just pick and choose which organisms that fit into the definition that you want to be called that. it's based on organisms relation to each other, and since the different types of dinosaurs were just as related to each other as they are to modern day birds that's the definition that makes sense.